In reviewing my company's documenation I'm finding a lot of acronyms that are not defined or even identified as to what the initials stand for. I don't have a problem with this at the form/work instruction level but it seems like it should be defined in the higher procedures. I seem to remember something in ISO requiring definition of terminology that may be unique to the organization or process. Is is required or just a nicety for the auditor? Thanks for your feedback.